To demote a Windows 2003 Active Directory from a domain controller to a member server, perform the following from the domain controller you wish to demote:

1) Go to Start/Administrative Tools/Active Directory Users and Computers.

2) Right mouse click on the domain, and click on “Connect to Domain Controller.”

3) Choose the domain controller that you want to demote. Note: The one you should be logged into.

4) Now issue the dcpromo command to remove Active Directory and demote the server.